It should be green by the time your lights come on. Then yellow-green by the end of the photoperiod. Depending on how you dissolve co2, you might have to have your co2 come on earlier. Just do your adjustments slowly and watch your fish.

It should be green by the time your lights come on. Then yellow-green by the end of the photoperiod. Depending on how you dissolve co2, you might have to have your co2 come on earlier. Just do your adjustments slowly and watch your fish.

Slow adjustment is key. :-)

Right now its blue-ish green by the end of the day.
I have an atomic inline diffuser. I will upload some pics of the setup.
Right now its taking almost 10 hours to get blue-green at about 1 BPS.

Since there is a delay in the change of the drop checker's color and it takes time for the CO2 to build up in the water you would probably at the maximum CO2 level a couple hours before lights on if the drop checker was showing blue green at lights on. Not really a problem unless the tank tends to be low in oxygen or you are trying to get as much out of the CO2 tank as possible.

Try taking a water sample from the tank itself at lights out and trying to get close to that level at lights on instead. That won't tell you how much CO2 is in the water as there are other substances in the water affecting pH but it will give you a relative amount. So if your water is 7.4 at lights out then you would like the water to be 7.4 at lights on.

Not quite sure what type of solution that comes with that dc. Might wanna ask who you bought that from.

The reaction time of a dc is slow but 1 bps in a 75gal sounds a bit low. I would try around 3-4 bps to start with. Best thing to do when adjusting co2, do it when you are able to be home all day. Use the dc to get close and then monitor the fish while you fine tune. Different tanks have different amounts of dissolved o2. Said tanks can handle more/less co2.

Register Now

In order to be able to post messages on the The Planted Tank Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:

Password

Please enter a password for your user account. Note that passwords are case-sensitive.

Password:

Confirm Password:

Email Address

Please enter a valid email address for yourself.

Email Address:

Log-in

User Name

Remember Me?

Password

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.